METHOD OF PRODUCING PARTICLES OF FERRITES Russian patent published in 2020 - IPC C30B29/26 C01G49/02 C01G51/02 C01G45/02 C01G3/02 H01F1/11 H01F1/34 H01F1/36 H01F1/44 A61K9/14 A61K49/06 

FIELD: technological processes.

SUBSTANCE: invention relates to the technology of producing particles of ferrites, which can be used in vacuum, space engineering, electronics, photonics, catalysis, medicine, magnetic resonance tomography, therapy, oncology. Method of producing particles of spinel-type ferrites, having mainly isotropic form and containing iron and one divalent metal, different from iron, in ratio of at least two iron atoms to one divalent metal atom, in which divalent metal is selected from a group comprising manganese and cobalt, is that an aqueous solution containing divalent iron ions and divalent metal ions in ratio of two ferrous ions to one divalent metal ion, mixed with sodium hydroxide, subjected to oxidizer and ferritized mixture while heated in an aqueous medium, and then separated particles of ferrite of spinel type from solution, wherein copper is added to group from which divalent metal is selected; oxidant is sulphate or hydroxylamine chloride in stoichiometric amount, and sodium hydroxide is added twice: at the oxidation step in stoichiometric amount with respect to divalent iron in a solution of salts with an oxidant at room temperature in a weakly acidic medium with pH=6; for ferritization step in an amount sufficient to provide the solution alkaline medium with pH=14 and the ferritization is carried out at temperature of 100 °C for 10 minutes.

EFFECT: technical result consists in simplicity of method and laboratory equipment; reduced prime cost and time of ferrite synthesis.

1 cl, 3 dwg, 3 ex